ethinyl estradiol

noun

Definition of ethinyl estradiol

  1. :  a very potent synthetic estrogen C20H24O2 used especially as an oral contraceptive

First Known Use of ethinyl estradiol

1938


Medical Dictionary

ethinyl estradiol

noun
variants: or

ethynylestradiol

\ˌeth-ə-nil-ˌes-trə-ˈdī-ˌȯl, -ˌōl\play play or chiefly British

ethinyloestradiol

or

ethynyloestradiol

\ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl, -ē-ˈstrad-ē-ˌȯl, -ˌōl\play play

Medical Definition of ethinyl estradiol

  1. :  a white crystalline very potent synthetic estrogen C20H24O2 prepared from estrone and used in combination (as with norgestrel or norethindrone) as a birth control pill or alone in the treatment of menopausal symptoms or female hypogonadism or in the palliative treatment of prostate or breast cancer—see loestrin, minastrin, nuvaring, ortho evra, ortho-novum, ortho tri-cyclen, seasonale, seasonique, yasmin, yaz


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